comparison src/fftw-3.3.3/api/rdft2-pad.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include <string.h>
+#include "api.h"
+
+const int *X(rdft2_pad)(int rnk, const int *n, const int *nembed,
+			int inplace, int cmplx, int **nfree)
+{
+     A(FINITE_RNK(rnk));
+     *nfree = 0;
+     if (!nembed && rnk > 0) {
+          if (inplace || cmplx) {
+               int *np = (int *) MALLOC(sizeof(int) * rnk, PROBLEMS);
+               memcpy(np, n, sizeof(int) * rnk);
+               np[rnk - 1] = (n[rnk - 1] / 2 + 1) * (1 + !cmplx);
+               nembed = *nfree = np;
+          } else
+               nembed = n;
+     }
+     return nembed;
+}